आउटेज मूल-कारण खोजक
Most checkers only say "down". This one walks the connection layer by layer and tells you where it breaks and what to try next.
What this tool checks
- DNS: does the domain resolve and are nameservers present
- TCP: can we open a connection on ports 443 and 80
- TLS: valid certificate, correct name, trusted chain
- HTTP: status code, redirects and response time
- CDN or proxy in front of the site
- Content: empty pages, maintenance, parked or default server pages, WAF challenges
How to read the result
The checks run in the order a browser performs them. The first layer that fails is the likely root cause; later layers are marked as not reached. If every layer passes, the problem is probably on your side (network, DNS cache, VPN or browser).
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अक्सर पूछे जाने वाले प्रश्न
How is this different from a normal down checker?
A basic checker reports up or down. This tool tests each layer separately, so you learn whether the problem is DNS, the certificate, the server or the page content.
What if everything passes but I still cannot open the site?
Then the site is reachable from our server. Try another network, clear your DNS cache, disable any VPN, and read our guide on down for everyone or just you.
Can it find the cause of a 502 or 504?
It reports the status and the layer, and the matching fix guides explain what to check on the server, such as fixing a 502 Bad Gateway.